BACKGROUND OF THE INVENTION
The new cultivar was discovered as
an induced mutation using the known
chemical colchicine, of Hosta hybrid 'Paradise
Island' U.S. Plant Pat.
No. 20,798. 'Volcano Island' was
discovered by the inventor,
Marco Fransen, a citizen of the
Netherlands in October of 2008, at a
research facility in Ter Aar, The
Netherlands. The intent of the
breeding program was to create new
tetraploid Hosta hyrids with
stronger characteristics.
Directly after discovery of the
tetraploid mutation, the inventor
initiated cultivation in tissue
culture, during October of 2008, in
a commercial laboratory in Iribov
Heerhugowaard, the Netherlands.
Subsequently 'Volcano Island' has
been reproduced by micro-propagation
in a commercial laboratory in Iribov
Heerhugowaard, the Netherlands and
has shown that the unique features
of this cultivar are stable and
reproduced true to type through
several generations.
BRIEF SUMMARY OF THE INVENTION
The cultivar 'Volcano Island' has
not been observed under all possible
environmental conditions. The
phenotype may vary somewhat with
variations in environment such as
temperature, day length, and light
intensity, without, however, any
variance in genotype.
The following traits have been
repeatedly observed and are
determined to be the unique
characteristics of 'Volcano Island' These characteristics in combination
distinguish 'Volcano Island' as a
new and distinct Hosta cultivar:
1. Distinctive, bright
foliage with a green margin.
2. Thick foliage resistant
to environmental stressors.
3. Large foliage
4. Vigorous plant.
COMPARISON TO PARENT
Plants of the new cultivar 'Volcano Island' are similar to plants of the
parent; Hosta hybrid 'Paradise
Island' in most horticultural
characteristics, however, plants of
the new cultivar 'Volcano Island' are more vigorous and produce
thicker, stronger leaves than the
parent variety. Additionally, the
new variety produces larger foliage
than 'Paradise
Island'. Leaves of 'Volcano Island' have a wider
variegation on the margin than 'Paradise
Island'.
COMMERCIAL COMPARISON
'Volcano Island' can be compared to
the commercial variety Hosta hybrid 'Eye Declare' U.S. Plant Pat. No.
18,466. The varieties are similar in
most horticultural characteristics,
however, plants of the new cultivar 'Volcano Island' are more vigorous
and produce thicker, stronger leaves
than the 'Eye Declare'.
Additionally, the new variety
produces larger foliage than 'Eye Declare' and have foliage with a
wider, darker green margin than 'Eye Declare'.
BRIEF DESCRIPTION OF THE PHOTOGRAPHS
The accompanying photograph in FIG.
1 illustrates in full color a
typical plant of 'Volcano Island' grown outdoors. This plant is
approximately 6 months old, shown in
a 1 liter pot.
FIG. 2 illustrates a flowering
plant.
The photographs were taken using
conventional techniques and although
colors may appear different from
actual colors due to light
reflectance it is as accurate as
possible by conventional
photographic techniques.
DETAILED BOTANICAL DESCRIPTION
In the following description, color
references are made to The Royal Horticultural Society Colour Chart,
2007, except where general terms of
ordinary dictionary significance are
used. The following observations and
measurements describe 'Volcano Island' plants grown in a commercial
nursery in the Netherlands, from
February of 2011 through June of
2011. Temperatures were 5° C. to 20°
C. at night and 10° C. to 30° C.
during the day. Measurements and
numerical values represent averages
of typical plant types. No growth
regulators or special treatments
were used.
+ Botanical Classification: Hosta hybrid '
Volcano Island'.
PROPAGATION
• Time to initiate roots:
Approximately 14 to 21 days at 23°
C.
• Root description: Fleshy
with moderate side roots.
PLANT
• Growth habit: Upright,
herbaceous perennial plant.
• Height: Approximately 35 cm (13.7 in.)
in a 1 liter pot.
• Plant spread: Approximately 50 cm (19.6 in.) .
• Growth rate: Moderate.
• Branching characteristics:
Branches emerge directly from the
roots.
• Age of plant described:
Approximately 4 months from a stage
3 tissue culture.
FOLIAGE
• Leaf:
- Quantity per
Plant: Average
30.
- Leaf type: Simple, basal
emerging.
- Average leaf
length: Approximately 52 cm (20 in.) .
- Average leaf
width: Approximately 22 cm (8.7 in.), at
widest point.
- Apex: Acute.
- Base: Cordate.
- Overall leaf shape: Obovate.
- Overall leaf
aspect: Arching.
- Margin: Slightly undulating.
- Texture of top
surface: Smooth.
- Texture of bottom
surface: Smooth.
- Appearance of top
surface: Slightly leathery.
- Appearance of bottom
surface: Slightly leathery.
- Pubescence: No pubescence on
leaves.
- Color: Young foliage upper
side: Near RHS Yellow-Green 151A,
margin near RHS Green 141A. Young
foliage under side: Near RHS
Yellow-Green 151A, margin near RHS
Green 141A. Mature foliage upper
side: Near RHS Yellow-Green 154D,
margin near RHS Green 141A. Mature
foliage under side: Near RHS
Yellow-Green 154C, margin near RHS
Green 141A.
- Venation: Type: Pinnate.
Venation coloration upper side: Near
RHS Yellow-Green 154D sporadically
along central portion of the upper
leaf surface. RHS Green 141A
sporadically along margin of the
upper leaf surface. Venation
coloration under side: Near RHS
Yellow-Green 154D sporadically along
central portion of the under leaf
surface. RHS Green 141A sporadically
along margin of the under leaf
surface.
• Leaf petiole:
- Length: Approximately 10 cm (4 in.). (3.9 in.)
- Width: Approximately 2.9 cm (3.5 in.)
at widest point.
- Color: Upper side: Near RHS
Yellow-Green N144B, heavily flushed
Greyed-Purple 184A. Under side: Near
RHS Yellow-Green N144C, heavily
flushed Greyed-Purple 184A.
- Strength: Very strong.
• Other foliage
characteristics: Thick foliage,
resistant to mechanical damage and
environmental stressors.
FLOWER
• Natural flowering season:
Early summer to midsummer.
• Inflorescence type and
habit: Flowers single, campanulate
arranged in racemes.
• Rate of flower opening:
Lowest flower opens first, all
flowers have opened in approx. 2
weeks.
• Flower longevity on Plant: Approx. 2 weeks.
• Quantity of Flowers: Average: 25 flowers per raceme.
• Raceme size:
- Height: Approximately 10.4.0 cm (1.6 in.), from lowest flower to top of
Inflorescence.
- Width: Approximately 5.5 cm (2.1 in.) .
• Flower:
- Perianth:
Arrangement: Campanulate.
- Overall flower size: Length:
Approximately 5.0 cm (1.9 in.) . Width:
Approximately 2.8 cm (3.1 in.) at widest
point.
• Color:
- Tepals: When opening: : :
Outer surface: Violet; near RHS 84A,
base purple-violet; near RHS N80C.
Inner surface: Purple-violet; near
RHS N82B, base purple; near RHS 76A.
- Fully opened: Outer surface:
Violet; near RHS 84B. Inner surface:
Purple-violet; near RHS N82C. Color
Changes when Aging: Near RHS 84C.
• Sepals or Bracts?:
- Quantity: One bract is
placed under each individual flower.
- Shape: Ovate, concave.
- Length: Approximately 2.0 cm (0.8 in.) .
- Diameter: Approximately 0.9 cm (0.35 in.) .
- Color: Outer surface:
Yellow-green; near RHS 146D and
151A, tinged greyed-orange; near RHS
177A and purple; near RHS N77C.
Inner surface: Yellow-green; near
RHS 146D, slightly tinged purple;
near RHS N77C. Color Changes when
Aging: Greyed-orange; near RHS 177B
to 177C.
• Bud:
- Shape: Obovate.
- Length: Approximately 2.7 cm (2.8 in.) .
- Diameter: Approximately 1.0 cm (0.4 in.) .
- Color: Purple-violet; near
RHS N82B to N82C, tip slightly
darker; near RHS N82A.
• Pedicels:
- Length: Approximately 0.6 cm (0.25 in.) .
- Width: Approximately 0.2 cm (0.08 in.) .
- Aspect: Placed to the
petiole in an average angle of 40°
(0°=vertical), curved slightly
Downward in an average angle of
−40°.
- Color: Purple-violet; near
RHS N82B to N82C.
• Scape:
- Length: Approximately 61.8 cm (3.1 in.) .
- Width: Approximately 0.5 cm (0.2 in.) .
- Angle: Near vertical.
- Strength: Very strong.
- Color: Greyed-purple; near
RHS 184A.
• Fragrance: No.
REPRODUCTIVE ORGANS
• Stamens:
- Number: Average 6.
- Filament
length: Approximately 3.9 cm (3.5 in.) .
- Filament
color: Yellow-green; near RHS 145D.
- Anther length: Approximately
0.6 cm (0.25 in.) .
- Anther color: Greyed-red;
Near RHS 178A.
- Anther shape: Oblong,
dorsifixed.
- Pollen: Moderate, coloured
yellow-orange; near RHS 17A.
• Pistil:
- Number: 1.
- Length: Approximately 3.9 cm (3.5 in.) .
- Style color: Yellow-green;
near RHS 150D.
- Stigma: Shape: Club-shaped.
Color: Yellow-green; near RHS 150C
to 150D.
- Ovary color: Yellow-green;
near RHS 145A.
OTHER CHARACTERISTICS
• Disease resistance: Better
resistance to diseases or pests has
been observed in this variety, due
to the strong, thick foliage.
• Temperature tolerance:
Hardy perennial, tolerates a
temperature range from approximately
−30° C. to at least 40° C.
• Drought tolerance: No
tolerance for drought.